{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "All patients had a pre - therapy Gram ' s stain and culture of sinus exudate obtained by antral puncture or nasal endoscopy ."}
{"Disease": [], "Chemical": []}